#include <iostream>
#include <string>
#include <numeric>
using namespace  std;
class Solution {
public:
	char findTheDifference(string s, string t) {
		return abs( accumulate(s.begin(), s.end(), 0) - accumulate(t.begin(), t.end(), 0));
	}
};
int main()
{
	Solution t;
	cout << t.findTheDifference("abcd", "abcde");
	
}